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參數資料
| 型號： | LM4891MBD |
| 廠商： | National Semiconductor |
| 文件頁數： | 17/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION LM4891M |
| 標準包裝： | 1 |
| 系列： | Boomer® |
| 放大器類型： | AB 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負載時最大輸出功率 x 通道數量： | 1W x 1 @ 8 歐姆 |
| 電源電壓： | 2.2 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | LM4891 |
| 已供物品： | 板 |
| 相關產品： | LM4891MX-ND - IC AMP AUDIO PWR 1W MONO 8SOIC LM4891MMTR-ND - IC AMP AUDIO PWR 1W MONO 8MSOP LM4891M-ND - IC AMP AUDIO PWR 1W MONO 8SOIC |
OBSOLETE
SNAS122E – MAY 2001 – REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS VDD = 5V
(1)(2)(3) (continued)
The following specifications apply for VDD = 5V, AV = 2, and 8 load unless otherwise specified. Limits apply for TA = 25°C.
LM4891
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(4)
(5)
ISD
Shutdown Current
Vshutdown = VDD
0.1
A (max)
PO
Output Power
THD = 2% (max); f = 1 kHz
1
W
THD+N
Total Harmonic Distortion+Noise
Po = 0.4 Wrms; f = 1kHz
0.1
%
PSRR(6)
Power Supply Rejection Ratio
Vripple = 200mV sine p-p
62 (f = 217Hz)
dB
66 (f = 1kHz)
(6)
PSRR is a function of system gain. Specifications apply to the circuit in Figure 1 where AV = 2. Higher system gains will reduce PSRR
value by the amount of gain increase. A system gain of 10 represents a gain increase of 14dB. PSRR will be reduced by 14dB and
applies to all operating voltages.
ELECTRICAL CHARACTERISTICS VDD = 3.3V
(1) (2) (3)
The following specifications apply for VDD = 5V, AV = 2, and 8 load unless otherwise specified. Limits apply for TA = 25°C.
LM4891
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(4)
(5)
IDD
Quiescent Power Supply Current
VIN = 0V, Io = 0A
3.5
mA (max)
ISD
Shutdown Current
Vshutdown = VDD
0.1
A (max)
PO
Output Power
THD = 1% (max); f = 1kHz
0.4
W
THD+N
Total Harmonic Distortion+Noise
Po = 0.15Wrms; f = 1kHz
0.1
%
PSRR(6)
Power Supply Rejection Ratio
Vripple = 200mV sine p-p
60 (f = 217Hz)
dB
62 (f = 1kHz)
(1)
All voltages are measured with respect to the ground pin, unless otherwise specified.
(2)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3)
For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a
maximum of 2A.
(4)
Typicals are measured at 25°C and represent the parametric normal.
(5)
Limits are specified to AOQL (Average Outgoing Quality Level).
(6)
PSRR is a function of system gain. Specifications apply to the circuit in Figure 1 where AV = 2. Higher system gains will reduce PSRR
value by the amount of gain increase. A system gain of 10 represents a gain increase of 14dB. PSRR will be reduced by 14dB and
applies to all operating voltages.
ELECTRICAL CHARACTERISTICS VDD = 2.6V
(1) (2) (3)
The following specifications apply for VDD = 2.6V, AV = 2, and 8 Load unless otherwise specified. Limits apply for TA = 25°C.
LM4891
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(4)
(5)
IDD
Quiescent Power Supply Current
VIN = 0V, Io = 0A
2.6
mA (max)
ISD
Shutdown Current
Vshutdown = VDD
0.1
A (max)
(1)
All voltages are measured with respect to the ground pin, unless otherwise specified.
(2)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3)
For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a
maximum of 2A.
(4)
Typicals are measured at 25°C and represent the parametric normal.
(5)
Limits are specified to AOQL (Average Outgoing Quality Level).
Copyright 2001–2013, Texas Instruments Incorporated
5
Product Folder Links: LM4891
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